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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7934582 | Engine silencing and vibration reduction system and method A noise and vibration reduction system for an engine affixed to a body and a method for reducing vibrations in the body produced by that engine during operation. The present invention is particularly related to noise and vibration reduction in auxiliary power units ... | 05/03/2011 |
| 7730997 | Air intake noise reducing device, internal combustion engine fitted with the same and structure for fitting the same to the internal combustion engine The present invention provides an air intake noise reducing device, an internal combustion engine fitted with the air intake noise reducing device and a structure for fitting the air intake noise reducing device to the internal combustion engine. The air intake nois... | 06/08/2010 |
| 7549511 | Exhaust sound and emission control systems The exhaust sound and emission control systems reduce sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination therewith in a single device. Alternatively, the sys... | 06/23/2009 |
| 7389853 | Muffler for an engine A muffler suited for use in discharging exhaust gas from an engine. The muffler generally includes a housing that defines a muffler interior, an inlet aperture, and an outlet aperture. A baffle that defines a baffle interior is positioned to divide the muffler inter... | 06/24/2008 |
| 7380639 | Backpressure reducing exhaust system with stationary blade structure The present invention provides an exhaust chamber system, comprising a stationary propeller type blade assembly with a nose cone within or adjacent to an expansion chamber, to create a vortex that swirls exhaust gas towards the outlet. The resultant vacuum within th... | 06/03/2008 |
| 7367419 | Oxygen concentration sensor for a saddle ride type all-terrain vehicle A saddle ride type all-terrain vehicle includes an engine, a front wheel and rear wheels, a saddle type rider's seat, and a rear fender provided so as to cover the surroundings of the saddle type rider's seat and the rear wheels. The vehicle further includes an exha... | 05/06/2008 |
| 7350620 | Compact silencer There is disclosed a silencer for attenuating sound waves produced in a fluid that circulates through a fluid conveyer. The silencer comprises an expansion chamber that is in fluid communication with the fluid conveyer, and which carries sound waves there through; a... | 04/01/2008 |
| 7308967 | Sound suppressor A sound suppressor for a firearm for reducing sound and flash levels upon the discharge of a firearm comprises a cylindrical housing, a proximal end cap with means for attachment to a firearm and to the cylindrical housing, a distal end cap with means for attachment... | 12/18/2007 |
| 7308966 | Device for reducing jet engine exhaust noise using oscillating jets A device for reducing engine exhaust noise in an aircraft engine includes a number of oscillating jets which direct an oscillating flow into the engine exhaust. The oscillating jets are connected via channels to a turbomachinery source of high pressure gas, where th... | 12/18/2007 |
| 7281606 | Exhaust sound and emission control systems The exhaust sound and emission control systems comprise a series of embodiments of devices for reducing sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination th... | 10/16/2007 |
| 7243757 | Exhaust muffler An exhaust muffler (1) invention includes an entry chamber (9), a resonator chamber (15), and a baffle chamber (23) positioned in serial order between an exhaust gas inlet (3) that lets exhaust gas into the entry chamber and an exh... | 07/17/2007 |
| 7219764 | Exhaust muffler A muffler may comprise a casing having an internal volume, an inlet and an outlet, and a diverter plate dividing the internal volume into a first chamber and a second chamber. The diverter plate may comprise a baffle wall portion and at least one diverter having a d... | 05/22/2007 |
| 7131514 | Noise attenuation device for a vehicle exhaust system A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the pass... | 11/07/2006 |
| 7104881 | Locator ring insert with baffles A connection assembly for an exhaust extraction system which is designed to vent the exhaust from a vehicle tail pipe includes, in combination, three primary components. One component is an annular sleeve which is constructed and arranged to assemble onto the vehicl... | 09/12/2006 |
| 7086497 | Induction system with low pass filter for turbo charger applications A flow tube for an induction system with a turbo charger includes a first tube half and a second tube half with a noise attenuation plate positioned between the halves. The noise attenuation plate includes a plurality of holes having varying diameters and depths. Th... | 08/08/2006 |
| 7086498 | Noise attenuation device for a vehicle exhaust system A noise attenuation device for a vehicle exhaust system is provided. The device includes an exhaust pipe having a passageway for receiving exhaust gas pulses from an engine. The device further includes a plurality of vanes extending from an inner surface of the pass... | 08/08/2006 |
| 6945355 | Muffler arrangement for a flow duct A muffler arrangement includes muffler elements arranged in rows which are oriented in each case transversely to a direction of flow. The muffler elements themselves are oriented in each case longitudinally in relation to the direction of flow. The distance between ... | 09/20/2005 |
| 6942061 | Muffler for internal combustion engine A performance muffler suitable for installation into an exhaust system for an internal combustion engine wherein either end of the muffler may be designated as the entrance end for the receipt of exhaust gases into the muffler without materially altering the functio... | 09/13/2005 |
| 6935461 | Exhaust sound and emission control systems The exhaust sound and emission control system is a system for reducing sound and noxious emissions from an automotive exhaust. The system may have an exhaust resonator having one or more catalytic converter elements in combination therewith in a single device. Alter... | 08/30/2005 |
| 6902030 | Sound muffling apparatus for air operated equipment A muffler for equipment powered by compressed air, the muffler comprising a flexible muffler body formed from a sufficiently resilient material to resiliently deform under the influence of an exhaust air stream from an air motor, the body having an inlet and an outl... | 06/07/2005 |
| 6892851 | Acoustic attenuator An acoustic attenuator includes an intake air duct having an intake air duct opening leading to an outside environment and a blower fan opening leading to a blower fan. Air is drawn through the intake air duct opening towards the blower fan and a primary reflecting ... | 05/17/2005 |
| 6799657 | Absorptive/reactive muffler for variable speed compressors An absorptive and reactive muffler includes an annular flow path for the gas with the center of the annulus having a plurality of resonators which are in open communication with the downstream end of the annular flow path and make up the reactive portion of the muff... | 10/05/2004 |
| 6796403 | Exhaust system baffling apparatus An exhaust system baffling apparatus is provided. The apparatus includes a tube with at least one end that is not open. The apparatus further includes a plurality of C-shaped flanges in surrounding relation about the tube. The outer edges of the flanges have a conto... | 09/28/2004 |
| 6742623 | Muffler for internal combustion engine A muffler for an internal combustion engine is disclosed which is capable of effectively enhancing its muffling effect without any substantial increase in size, weight or manufacturing cost. The exhaust gas ejected from an exhaust port of the internal combustion eng... | 06/01/2004 |
| 6736238 | Air intake silencer A silencer for connection to the air intake of a machine such as a turbocharger compressor. The silencer comprises a housing containing a plurality of axially spaced annular noise attenuating baffles. Each baffle has an outer circumference and an inner circumference... | 05/18/2004 |
| 6688425 | Induction system with low pass filter for turbo charger applications A flow tube for an induction system with a turbo charger defines a longitudinal flow path and includes a noise attenuation plate positioned within the flow tube. A plurality of ribs formed on an internal surface of the tube. The ribs are spaced apart from... | 02/10/2004 |
| 6651773 | Exhaust sound attenuation and control system An exhaust sound attenuation and control system combines the functions of a muffler and resonator in a single, relatively compact device. The internal components of the device may also be coated with one or more emission reduction materials to provide a c... | 11/25/2003 |
| 6637546 | Carpet cleaning machine A muffler for a steam cleaning apparatus comprising a housing having a first and a second inlet, and an outlet, a plurality of baffles disposed within, and coupled to the housing, wherein the plurality of baffles are covered with a foam; wherein the first... | 10/28/2003 |
| 6622821 | Thin acoustic muffler exhaust pipes, method of sheet metal construction thereof, and exhaust systems which utilize such exhaust pipes for increased ground clearance on race cars A flattened acoustic muffler for use on stock cars. The muffler mounts to the standard exhaust system pipes and to the lower chassis of the car, routing exhaust gasses to one or both sides of the car while providing improved ground clearance between the e... | 09/23/2003 |
| 6609590 | Exhaust system having angled baffle In-line exhaust systems comprise an exhaust pipe, and a sound-attenuating baffle in the exhaust pipe. The baffle has one or more baffle plates extending across the gas flow channel, at least one at an oblique angle. Each plate has an array of apertures th... | 08/26/2003 |
| 6510921 | Muffler/exhaust extractor A muffler has an elongated generally cylindrical casing having inlet and outlet ends, an elongated generally frustroconical baffle in the casing adjacent the inlet end with the smaller diameter portion being spaced from the inlet end. The peripheral wall ... | 01/28/2003 |
| 6488482 | Integral compressor muffler A fluid compressor includes a compressor inlet for receiving a medium, a compressor for compressing the medium, a compressor outlet for discharging the compressed medium and a compressor muffler. The compressor muffler includes a housing defining an inner... | 12/03/2002 |
| 6131696 | Multiple inlet muffler A compressed gas muffler that accommodates multiple sources and removes back-pressure to the source has a housing with a top, a bottom, and four sides. An inlet has a lip and an open center. The lip extends from the top of the housing. The open center ext... | 10/17/2000 |
| 6079516 | Auto-matic back pressure relief muffler A muffler for an internal combustion engine comprises: a plurality of chambers formed by a single partitioning wall inside an outer shell to be communicated with each other at the entrance and at the exit of the muffler; and a flapper-valve is provided in... | 06/27/2000 |
| 5844178 | Resonance muffler A resonance muffler for two cycle internal combustion engines, with a rotationally symmetric resonator housing (1) into which an input pipe socket (8) is leading and which itself leads into an output pipe (4) containing a muffler, the resonator housing (1... | 12/01/1998 |
| 5739484 | Exhaust muffler An exhaust muffler includes a housing having a rectangularly shaped interior without fiberglass or other packing, an inlet tube on a first end portion of the housing for conveying exhaust gases to the interior, an outlet tube on an opposite second end por... | 04/14/1998 |
| 5733106 | Suction muffler for a reciprocating compressor with external holes to reduce noise attenuation A reciprocating compressor includes a cylinder block disposed in a chamber formed by a casing. A piston is mounted for reciprocation in a bore of the cylinder block. A valved cylinder head is disposed at an end of the bore. The cylinder head conducts suck... | 03/31/1998 |
| 5661973 | Muffler and fuel saving device for internal combustion diesel engine An improved muffler and energy saving device for diesel engines comprising a housing having an inlet passageway for admitting gases into the interior of the housing and an outlet passageway for discharging gases from the housing, an alcove, near the entra... | 09/02/1997 |
| 5152366 | Sound absorbing muffler A sound absorbing muffler constuction is provided. The muffler includes a s conduit having an unobstructed gas flow path and a plurality of perforations passing through its walls along a portion thereof. A sound attenuator body encases the perforated port... | 10/06/1992 |
| 4923033 | Heating device, particularly automotive heating device, with an integrated muffler A heating device, particularly an automotive heating device, in which a noise muffling device is integrated within the heating device. The muffler can be provided in the combustion pipe defining the combustion chamber, or the combustion pipe, itself, can ... | 05/08/1990 |
